Hadith 4:16
Hafs narrated to us, from Mujalid, from al-Sha'bi, who said: Umar said: "Fasting is not [merely] from food and drink alone, but it is [also] from lying, falsehood, vain talk, and swearing."
حدثنا حفص عن مجالد عن الشعبي قال قال عمر ليس الصيام من الطعام والشراب وحده ولكنه من الكذب والباطل واللغو والحلف